157763991 has 32 divisors (see below), whose sum is σ = 270729216. Its totient is φ = 79308000.

The previous prime is 157763989. The next prime is 157763999. The reversal of 157763991 is 199367751.

It is not a de Polignac number, because 157763991 - 2¹ = 157763989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157763991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157763999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3855 + ... + 18176.

It is an arithmetic number, because the mean of its divisors is an integer number (8460288).

Almost surely, 2^157763991 is an apocalyptic number.

157763991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157763991 is a deficient number, since it is larger than the sum of its proper divisors (112965225).

157763991 is a wasteful number, since it uses less digits than its factorization.

157763991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22083.

The product of its digits is 357210, while the sum is 48.

The square root of 157763991 is about 12560.4136476471. The cubic root of 157763991 is about 540.3427076967.

The spelling of 157763991 in words is "one hundred fifty-seven million, seven hundred sixty-three thousand, nine hundred ninety-one".